989523174899 has 16 divisors (see below), whose sum is σ = 1152294958080. Its totient is φ = 832106277600.

The previous prime is 989523174869. The next prime is 989523174943. The reversal of 989523174899 is 998471325989.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 989523174899 - 2¹⁶ = 989523109363 is a prime.

It is a super-2 number, since 2×989523174899² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (989523174869) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6360362 + ... + 6514080.

It is an arithmetic number, because the mean of its divisors is an integer number (72018434880).

Almost surely, 2^989523174899 is an apocalyptic number.

989523174899 is a deficient number, since it is larger than the sum of its proper divisors (162771783181).

989523174899 is a wasteful number, since it uses less digits than its factorization.

989523174899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171130.

The product of its digits is 352719360, while the sum is 74.

The spelling of 989523174899 in words is "nine hundred eighty-nine billion, five hundred twenty-three million, one hundred seventy-four thousand, eight hundred ninety-nine".